GPS-Based Attitude Determination for Microsatellites

A. Hauschild, O. Montenbruck

Abstract:	This paper introduces a new attitude determination algo- rithm using differential GPS carrier phase measurements. The algorithm is based on a Kalman filter which processed single differences and estimates the base line vectors, the clock offset, the angular velocity and acceleration vector as well as the single difference ambiguities.The resolution of double difference ambiguities is accomplished using the LAMBDA-method. The double difference ambiguities are used to constrain the single difference ambiguities in the filter state.The accuracy of the estimated attitude is as- sessed with real measurements from ground based tests on a turntable. Numerical simulations have been used to test the algorithm for a spaceborne scenario. Furthermore, the performance of the initial ambiguity resolution is assessed.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	2424 - 2434
Cite this article:	Hauschild, A., Montenbruck, O., "GPS-Based Attitude Determination for Microsatellites," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 2424-2434.
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